Found just south of the Village of Doolin, in the Irish region of Burren, the Cliffs of Moher are some of the country’s most remarkable coastal features. They rise slowly from Doolin, and reach a height of more than 700 feet (213 meters) above the sea level. Their length along the shoreline is of about 8 kilometers, and their highest point is around O’Brien’s Tower – a round stone tower built in 1835 by Sir Cornelius O’Brien, which has since become a widely successful touristic attraction.
The cliffs were formed more than 320 million years ago, and were initially part of a large river delta. They consist mainly of Namurian shale and sandstone, and some of the oldest of the rocks can be found forming unconformities at the base of the cliffs.
Today the cliffs are regarded among the most frequently visited sites in Ireland, receiving more than 1 million visitors every year. They are also an important place for bird watching, as they house more than 30,000 birds from 20 different species.